Funding for this research was provided by:
University of Szeged (EFOP-3.4.3)
Received: 10 February 2019
Accepted: 24 February 2020
First Online: 6 March 2020
Ethics approval and consent to participate
: The study was approved by the Human Ethics Review Board of the University of Szeged (approval No. 41/2018), and the study design conformed in all respects to the Declaration of Helsinki. Written informed consent was obtained from all participants.
: Not applicable
: The authors declare that they have no competing interests.